<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .box{
            /* word-spacing: -1em;
            display: table; */
            letter-spacing:-5px
        }
        .item{
            height: 40px;
            width: 100px;
            border: 1px solid #000;
            display: inline-block;
            /* float:left */

            /* letter-spacing:-10px */
          
        }
        .clearfix:after {
        content: '';
        display: block;
        height: 0;
        clear: both;
        visibility: hidden;
        }
         .clearfix {
        zoom:1; 
         }
    </style>
</head>
<body>
    <div class="box">
        <div class="item">1</div>
        <div class="item">2</div>
        <div class="item">3</div>
        <div class="item">4</div>
    </div>
</body>
</html>